Thanks Tomáš Mózes <hydrapolic@gmail.com> for helping.
Package-Manager: portage-2.2.26
Signed-off-by: Patrice Clement <monsieurp@gentoo.org>
--- /dev/null
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+inherit java-pkg-2 java-pkg-simple
+
+DESCRIPTION="JavaScript and CSS compressor"
+HOMEPAGE="http://yui.github.io/yuicompressor/"
+SRC_URI="https://github.com/yui/yuicompressor/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+CDEPEND="
+ dev-java/jargs:0
+ dev-java/rhino:1.6"
+
+DEPEND="
+ ${CDEPEND}
+ >=virtual/jdk-1.6"
+
+RDEPEND="
+ ${CDEPEND}
+ >=virtual/jre-1.6"
+
+S="${WORKDIR}/${P}"
+
+JAVA_GENTOO_CLASSPATH="
+ jargs
+ rhino-1.6
+"
+
+JAVA_SRC_DIR="src"
+
+java_prepare() {
+ java-pkg_clean
+}